STUDY OF DIFFUSION BONDING OF TUNGSTEN ALLOYS
Abstract
Efforts to develop diffusion-bonding techniques for bonding W laminates for rocket motor nozzles are summarized. A study was made to determine the relationship of temperature, pressure, and material thickness in blanking of W sheet. The force required increased linea ly with blank diameter and material thickness. A study of diffusion bonding was made of commercially pure W with Al, Cr-Ni, Cr-Pd, Ti-Ni, Ti-Ni-Cr and 4 commercial braze alloys. Diffusion treatments following brazing consisted of 1950 F for 4 hr, 1950 F for 19 hr, 2100 F for 3.5 hr, and 2250 F for 2 hr. Good joints were obtained with all braze alloys except Al and Ti-Ni-Cr mixtures. Remelt temperatures were determined for brazed and diffused joints; the lower-temperature diffusion treatment (1950 F for 4 hr) gave as high or higher remelt temperatures for each alloy than a higher-temperature diffusion treatment. Double-lap shearstrength specimens were prepared from each of the 4 commercial braze alloys which were used to fabricate nozzle liners for tests under firing conditions (4900 F flame temperature, 750-psig chamber pressure, 60-sec duration).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1961
- Accession Number
- AD0262735
Entities
Organizations
- Aerojet Rocketdyne Holdings